Are rules with required bindings supported somehow?

[kipz]

I'm trying to create a Rule that forces some vars to be bound. In this case, ?name:

  (d/q '[:find ?greeting
         :in $ %
         :where
         (say-hello "kipz" ?greeting)]
       db
       '[[(say-hello [?name] ?result)
          [(ground "hello, ") ?greeting]
          [(str ?greeting ?name) ?result]]])

But this unexpectedly fails warning of unbound vars:

; Execution error (ExceptionInfo) at datalevin.query/check-bound (query.cljc:751).
; Insufficient bindings: #{?name__auto__9} not bound in [(str ?greeting__auto__9 ?name__auto__9) ?greeting]

Without the [..bound vars..] notation, all works just fine:

(d/q '[:find ?greeting
         :in $ %
         :where
         (say-hello "kipz" ?greeting)]
       db
       '[[(say-hello ?name ?result)
          [(ground "hello, ") ?greeting]
         [(str ?greeting ?name) ?result]]])

->>

#{["hello, kipz"]}

• Ref: https://docs.datomic.com/cloud/query/query-data-reference.html#rules

[huahaiy]

Have you tried this in datascript?

[kipz]

Have you tried this in datascript?

Tried just now, and same result in datascript.

[kipz]

Just found this: tonsky/datascript#441

Sorry, I didn't realisze that Datascript provided the Datalog parser/engine.